The Petronas Towers, in Kuala Lumpur, Malaysia, were once the World's 1st and 2nd tallest buildings from 1998 to 2004 if measured from the level of the main entrance to the structural top. Critics point out that this applies to only one of four height categories defined by the Council on Tall Buildings and Urban Habitat - although the three additional height categories were only introduced as the tower neared completion in 1996, as opposed to the original category which had been in use since 1969. In terms of the height to roof, as well as the height to pinnacle point it is a fair bit shorter than the Sears Tower, Chicago, United States.